[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR426.20] [Page 30] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 426_GLASS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Subpart B_Sheet Glass Manufacturing Subcategory Sec. 426.20 Applicability; description of the sheet glass manufacturing subcategory. Source: 39 FR 5714, Feb. 14, 1974, unless otherwise noted. The provisions of this subpart are applicable to discharges of pollutants resulting from the process in which several mineral ingredients (sand, soda ash, limestone, dolomite, cullen and other ingredients) are mixed, melted in a furnace, and drawn vertically from a melting tank to form sheet glass.